<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>电梯导航</title>
    <script src="../js/test56.js"></script>
    <style>
        ul {
            position: fixed;
            top: 200px;
            left: -40px;
        }
        li {
            list-style: none;
            width: 120px;
            height: 40px;
            text-align: center;
            line-height: 40px;
            margin-bottom: 20px;
        }
        .change {
            background-color: #e1251b;
            color: white;
        }
        .jfloor {
           
            width: 500px;
            height: 300px;
            margin-bottom: 30px;
            margin-left: 300px;
          
        }
        .jfloor1 {
            background-color: #e1251b;
        }
        .jfloor2 {
            background-color: burlywood;
        }
        .jfloor3 {
            background-color: aqua;
        }
        .jfloor4 {
            background-color: aquamarine;
            margin-bottom: 400px;
        }
    </style>
</head>
<body>
    <ul class="aside">
        <li class="item change">1</li>
        <li class="item">2</li>
        <li class="item">3</li>
        <li class="item">4</li>
    </ul>
    <div class="content">
        <div class="jfloor jfloor1">1</div>
        <div class="jfloor jfloor2">2</div>
        <div class="jfloor jfloor3">3</div>
        <div class="jfloor jfloor4">4</div>
    </div>
</body>
</html>